Maverik359 Posted December 14, 2023 Share Posted December 14, 2023 Hi I'm planning on purchasing a dew heater but am unsure about what actual size I need to get. I have a Skywatcher explorer 150pds. I'm quite new to this so appologises. Do I have a 6" or 7 inch scope? Thanks for any help that anyone may offer. Link to comment Share on other sites More sharing options...
michael.h.f.wilkinson Posted December 14, 2023 Share Posted December 14, 2023 Measure the tube diameter, and use that as a guide. A slightly longer dew heater is not a problem, to short is a pain Link to comment Share on other sites More sharing options...
knobby Posted December 14, 2023 Share Posted December 14, 2023 Hi, a 150PDS is a 6" scope (the 150 refers to mm) but as Michael said, measure it's diameter just to be safe. Link to comment Share on other sites More sharing options...
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